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system with better sag characteristics of an excavator. ? 4. System Simulation MathWorks Inc. MATLAB is introduced in 1984 a set of numerical simulation software, is divided into the total package and a number of kits, you can achieve the numerical analysisDifferent branch of mathematics it to function in the form of algorithms classified as libraries, the use of direct calls to these functions and give the actual parameters of the problem can be solved quickly and accurately. that is, to a series of connecting module, a plex model of the system. In recent years, was the rise of the Simulink has bee a field of academic and industrial ? Building, simulation and analysis of dynamic systems on the most widely used software package, it supports linear and nonlinear systems, could create a continuous time, discretetime system or a mixture of the two models. System is also able to multisampling frequency (Multirate), which is different in different systems can bine the sampling frequency. Simulink of MATLAB as an additional ponent, a system used to provide most of the work of modeling and simulation platform. Simulink is a way of modules allow users to quickly and accurately to create puter models of dynamic systems, especially for plex nonlinear, and its effect more visible. Simulink model can be use